100138772533 has 4 divisors (see below), whose sum is σ = 100172686348. Its totient is φ = 100104858720.

The previous prime is 100138772491. The next prime is 100138772549. The reversal of 100138772533 is 335277831001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31498440484 + 68640332049 = 177478^2 + 261993^2 .

It is a cyclic number.

It is not a de Polignac number, because 100138772533 - 2⁹ = 100138772021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100138772563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16952478 + ... + 16958383.

It is an arithmetic number, because the mean of its divisors is an integer number (25043171587).

Almost surely, 2^100138772533 is an apocalyptic number.

It is an amenable number.

100138772533 is a deficient number, since it is larger than the sum of its proper divisors (33913815).

100138772533 is an equidigital number, since it uses as much as digits as its factorization.

100138772533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33913814.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 100138772533 in words is "one hundred billion, one hundred thirty-eight million, seven hundred seventy-two thousand, five hundred thirty-three".